NSS tools : cmsutil

The cmsutil command-line uses the S/MIME Toolkit to perform basic
operations, such as encryption and decryption, on Cryptographic Message
Syntax (CMS) messages.

To run cmsutil, type the command cmsutil option [arguments] where option
and arguments are combinations of the options and arguments listed in the
following section. Each command takes one option. Each option may take
zero or more arguments. To see a usage string, issue the command without
options.

Options and Arguments

Options

Options specify an action. Option arguments modify an action. The options
and arguments for the cmsutil command are defined as follows:

-D

Decode a message.

-C

Encrypt a message.

-E

Envelope a message.

-O

Create a certificates-only message.

-S

Sign a message.

Arguments

Option arguments modify an action and are lowercase.

-c content

Use this detached content (decode only).

-d dbdir

Specify the key/certificate database directory (default is ".")

-e envfile

Specify a file containing an enveloped message for a set of
recipients to which you would like to send an encrypted message.
If this is the first encrypted message for that set of recipients,
a new enveloped message will be created that you can then use for
future messages (encrypt only).

-G

Include a signing time attribute (sign only).

-h num

Generate email headers with info about CMS message (decode only).

-i infile

Use infile as a source of data (default is stdin).

-N nickname

Specify nickname of certificate to sign with (sign only).

-n

Suppress output of contents (decode only).

-o outfile

Use outfile as a destination of data (default is stdout).

-P

Include an S/MIME capabilities attribute.

-p password

Use password as key database password.

-r recipient1,recipient2, ...

Specify list of recipients (email addresses) for an encrypted or
enveloped message. For certificates-only message, list of
certificates to send.

NSS is maintained in conjunction with PKI and security-related projects
through Mozilla dn Fedora. The most closely-related project is Dogtag PKI,
with a project wiki at [1]http://pki.fedoraproject.org/wiki/.